P0174
2003 Ford Ranger 4.0 SOHC. My truck threw this code. I looked into it and says its most likely a vacuum leak. I have changed prior to this- plugs/wires, coil pack, MAF sensor. Since getting this code I have replaced the intake manifold gasket, iac gasket, throttle body gasket, pcv valve, and o2 sensor upstream on driverside. I've sprayed all the vacuum line and cant seem to find any leak at all. I'm starting to get frustrated. After changing the iac/throttle body gasket the idling fluctuates. Any ideas on what the issue could be???
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